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AAT3141ITP-T1

更新时间： 2024-02-18 11:34:15

品牌	Logo	应用领域
ANALOGICTECH		泵
页数	文件大小	规格书
16页	481K
描述
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications

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技术参数
数据手册

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AAT3141ITP-T1 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.76
接口集成电路类型：	LED DISPLAY DRIVER	Base Number Matches：	1

AAT3141ITP-T1 数据手册

AAT3141

High Efficiency 1X/1.5X/2X Charge Pump

for White LED Applications

™

ChargePump

General Description

Features

The AAT3141 is a low noise, constant frequency

charge pump DC/DC converter that uses a tri

mode load switch (1X), fractional (1.5X), and dou-

bling (2X) conversion to maximize efficiency for

White LED applications. The device produces cur-

rent levels up to 30mA on each of its 4 current

source outputs to drive various arrangements of

LEDs from a 2.7V to 5.5V input. Outputs may be

operated individually or in parallel for driving high-

er-current LEDs. A low external parts count (two

1µF flying capacitors and two small 1µF capacitors

at V_IN, and CP) make the AAT3141 ideally suited

for small battery-powered applications.

•

Tri Mode 1x, 1.5x, and 2x Charge Pump for

Maximum Efficiency and V_Fcoverage

Drives Low-V_F& High-V_FType LEDs

Up to 4, 30mA Outputs

•

AS Cwire Independent 3+1 output addressing

32 Position Logarithmic Scale with Digital

Control

•

Low Noise Constant Frequency Operation

1MHz Switching Frequency

Small Application Circuit

Regulated Output Current

Automatic Soft-Start

V_INRange: 2.7V to 5.5V

No Inductors

Analogic Tech™'s Advanced Simple Serial Control™

Iq < 1µA in Shutdown

(AS Cwire™) digital input is used to enable, disable

12 pin TSOPJW package

and set the LED drive current with a 32 level loga-

rithmic scale LED brightness control. The AAT3141

has a thermal management system to protect the

device in the event of a short circuit condition at an

output pin. Built-in soft-start circuitry prevents exces-

sive inrush current during start-up. A high charge

pump switching frequency enables the use of very

small external capacitors. In shutdown mode, the

device disconnects the load from V_INand reduces

quiescent current to less than 1µA. The AAT3141 is

available in the very small 12 pin TSOPJW package.

Applications

•

White LED Backlighting

White Photo-Flash for DSCs

Color (RGB) Lighting

Programmable Current Sources

Typical Application

V_IN

C1+

1µF

C1-

C2+

C_IN

C_CP

V_BATTERY

AAT3141

1µF

C2-

EN/SET

GND

3141.2004.07.0.91

12 3 4 5 6 7...16

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